I think you were told nonsense. Glass fibre doesn't break and shatter; it's flexible. It does have a minimum bend radius (depending on the type of fibre); but t

I think you were told nonsense. Glass fibre doesn't break and shatter; it's flexible. It does have a minimum bend radius (depending on the type of fibre); but that's to do with maintaining total internal refraction, and can be fixed by straightening out the fibre again.